Multifunctional efficient continuous sand filter

Abstract

The utility model discloses a multifunctional high-efficiency continuous sand filter, and particularly relates to a sewage treatment continuous sand filter, which comprises a central water inlet pipe arranged in the center of a reaction kettle, and a chemical feeding pipe group for feeding chemicals, a water inlet pipe group and a water outlet pipe group which are sequentially arranged along the water flow direction of the central water inlet pipe, a spiral mixer; a cyclone water distributor; the suspended matter sand filter material is filled in the reaction kettle and covers the position where the dosing pipe group is located; and the top effluent weir tank is arranged in the reaction kettle, is arranged close to the top and comprises a filtered water outlet extending out of the reaction kettle. The continuous sand filter is simple in structure, the removal effect of the continuous sand filter on suspended particles can be improved, and meanwhile, the situation that the suspended sand filter material is hardened after being used for a long time can be avoided.

Description

Technical Field

[0001] The utility model relates to sewage treatment and a continuous sand filter, in particular to a multifunctional and efficient continuous sand filter. Background Art

[0002] Continuous sand filter is a commonly used equipment for removing suspended particles from wastewater. It has the advantages of continuous backwashing without downtime and small footprint.

[0003] In conjunction with the publication (announcement) number: CN104722135B, the publication (announcement) date: 2016-02-24, a filtering device is disclosed that can improve the adsorption efficiency of filter sand and simultaneously realize the reciprocating cycle regeneration of filter sand. It is characterized in that: the micro-flocculation continuous sand filter also includes a water distribution device, a sand guide device, a micro-flocculation generating device and a filter sand cycle regeneration device; the filter sand cycle regeneration device is composed of two left and right curved sand lifting pipes, a double-layer annular solid-liquid separation tank, a power-assisted stirring dynamic sand washing body and two detachable sieve plate cross-flow rubbing sand washing bodies connected together; the water distribution pipe of the water distribution device is composed of a plurality of cross-connected water distribution main pipes welded in an umbrella shape, and a plurality of water distribution sieve caps are vertically welded and installed on each water distribution main pipe; the micro-flocculation generating device is composed of a connected ejector, a flocculation main pipe and a plurality of arc steel pipes with holes; the sand guide device is composed of a plurality of triangular steel plates spliced ​​together to form a polygonal cone, and its upper cone angle is close to the bottom of the water distribution device.

[0004] In the prior art including the above patents, due to uneven water distribution, the sand filter material is easy to be compacted and blocked, etc., which ultimately leads to a significant reduction in the use effect of the continuous sand filter. At the same time, the maintenance and repair frequency is increased, and the potential other purification functions are difficult to be explored and applied. Utility Model Content

[0005] The utility model aims to provide a multifunctional and efficient continuous sand filter to solve the above problems.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A multifunctional and efficient continuous sand filter comprises a central water inlet pipe arranged at the center of a reactor, and the following components are arranged in sequence along the water flow direction of the central water inlet pipe:

[0008] Dosing tube set for adding chemicals;

[0009] Spiral mixer;

[0010] Cyclone water distributor;

[0011] Also includes:

[0012] The suspended sand filter material is filled in the reactor and covers the location of the dosing tube group;

[0013] The top water outlet weir is arranged in the reactor and close to the top, and comprises a filtered water outlet extending to the outside of the reactor.

[0014] Preferably, the dosing pipe group includes a first dosing pipe and a second dosing pipe along the axial direction of the central water inlet pipe.

[0015] Preferably, the central water inlet pipe is provided with an upper air-water flushing component arranged in the water inlet direction of the cyclone water distributor, and a middle air-water flushing component and a lower air-water flushing component arranged in sequence in the water outlet direction of the cyclone water distributor.

[0016] Preferably, the output directions of all the air-water flushing components are upward.

[0017] Preferably, the cyclone water distributor is umbrella-shaped.

[0018] Preferably, a central sand lifting pipe extending to the interior of the central water inlet pipe is provided at the bottom of the reactor, and a sand washer is fixedly connected between the output end of the central sand lifting pipe and the water inlet of the top water outlet weir.

[0019] Preferably, the central water inlet pipe includes a sewage inlet located between the first dosing pipe and the second dosing pipe and extending upward to the outside of the reactor.

[0020] In the above technical scheme, the utility model provides a multifunctional and efficient continuous sand filter, which has the following beneficial effects: the cyclone water distributor distributes water evenly, thereby improving the removal effect of the continuous sand filter on suspended particles, while the cyclone water distributor also serves as a sand guide hopper, thereby simplifying the internal structure of the continuous sand filter.

[0021] Secondly, by starting the air-water flushing components, the compacted sand filter material can be loosened and broken without sand removal and maintenance, reducing the difficulty of blockage maintenance.

[0022] Furthermore, by using the dosing tube group to add different reagents, a rapid mixing reaction is achieved in the spiral mixer to deepen the removal of suspended particles, or to coordinate the treatment of COD, ammonia nitrogen, total phosphorus, heavy metals, POPs, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0024] Figure 1 A schematic structural diagram of an embodiment of the utility model is provided.

[0025] Description of reference numerals:

[0026] 1. Reactor; 2. Central water inlet pipe; 3. Cyclone water distributor; 4. Central sand lifting pipe; 5. Sand washer; 6-1. Upper air-water flushing component; 6-2. Middle air-water flushing component; 6-3. Lower air-water flushing component; 7. Suspended sand filter material; 8. Top water outlet weir; 9. Spiral mixer; 10-1. First dosing pipe; 10-2. Second dosing pipe. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0028] like Figure 1 As shown, a multifunctional and efficient continuous sand filter, sewage enters the central water inlet pipe 2 through the sewage inlet of the reactor 1, and the reagents added in the first dosing pipe 10-1 and the second dosing pipe 10-2 along the axial direction of the central water inlet pipe 2 are fully mixed in the spiral mixer 9 connected to the central water inlet pipe 2 and then flow down to the umbrella-shaped cyclone water distributor 3 for uniform water distribution.

[0029] After flocculation, the suspended sand filter material 7 in the reactor 1 is intercepted and removed, and then the purified sewage overflows to the top outlet weir 8 for collection and discharge at the outlet.

[0030] The sand filter material 7 with suspended matter attached to it falls to the bottom of the reactor 1 under the guidance of the umbrella-shaped structure of the cyclone water distributor 3, and is then lifted by the central sand lifting pipe 4 installed at the bottom of the reactor 1 and extending into the central water inlet pipe 2 to enter the sand washer 5 installed at the bottom of the top water outlet weir 8, so that the sand and suspended matter are separated, and the sand washing water containing high concentration of suspended matter is discharged to the wastewater collection pool.

[0031] In the embodiment, the sand filter material 7 falls to the top of the sand filter layer under the action of gravity and is used again to filter and intercept sewage. Figure 1 As shown, the central water inlet pipe 2 is provided with an upper air-water flushing component 6-1 arranged in the water inlet direction of the cyclone water distributor 3, and a middle air-water flushing component 6-2 and a lower air-water flushing component 6-3 arranged in sequence in the water outlet direction of the cyclone water distributor 3. When cleaning is required, all the upper air-water flushing components are opened in sequence to loosen and break the arch of the sand filter layer, thereby achieving sand-free and obstacle-removing.

[0032] It should be noted that the water flushing component includes a water pipe and nozzles arranged on the water pipe. The nozzles are arranged on the water pipe at a predetermined interval, so the number of nozzles is based on the length of the water pipe.

[0033] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A multifunctional and efficient continuous sand filter, characterized in that: It comprises a central water inlet pipe (2) arranged at the center of the reaction kettle (1), and the following components are arranged in sequence along the water flow direction of the central water inlet pipe (2): Dosing tube set for adding chemicals; Spiral mixer (9); Cyclone water distributor (3); Also includes: The suspended sand filter material (7) is filled in the reactor (1) and covers the location of the dosing tube group; A top water outlet weir (8) is arranged in the reactor and close to the top, and comprises a filtered water outlet extending to the outside of the reactor (1).

2. A multifunctional and efficient continuous sand filter according to claim 1, characterized in that: The dosing tube group comprises a first dosing tube (10-1) and a second dosing tube (10-2) along the axial direction of the central water inlet pipe (2).

3. A multifunctional and efficient continuous sand filter according to claim 1, characterized in that: The central water inlet pipe (2) is provided with an upper air-water flushing component (6-1) arranged in the direction of the water inlet of the cyclone water distributor (3), and a middle air-water flushing component (6-2) and a lower air-water flushing component (6-3) arranged in sequence in the direction of the water outlet of the cyclone water distributor (3).

4. A multifunctional and efficient continuous sand filter according to claim 1, characterized in that: The output direction of all air-water flushing components is upward.

5. A multifunctional and efficient continuous sand filter according to claim 1, characterized in that: The cyclone water distributor (3) is umbrella-shaped.

6. A multifunctional and efficient continuous sand filter according to claim 1, characterized in that: A central sand lifting pipe (4) extending to the interior of the central water inlet pipe (2) is provided at the bottom of the reactor (1), and a sand washer (5) is fixedly connected between the output end of the central sand lifting pipe (4) and the water inlet of the top water outlet weir (8).

7. A multifunctional and efficient continuous sand filter according to claim 1, characterized in that: The central water inlet pipe (2) comprises a sewage inlet located between the first dosing pipe (10-1) and the second dosing pipe (10-2) and extending upward to the outside of the reaction kettle (1).

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